[39.06] The X-ray Light Curve of Supernova 1978K

SN1978K, in NGC 1313, is a recently-recognized supernova, largely
because of an X-ray observation which revealed the source to have an
extreme X-ray luminosity ($\sim$10$^{39}$ ergs/s). It is the first
supernova for which an X-ray light curve has been obtained in which
the supernova is more than a year old. We have accumulated all of the
ROSAT HRI and PSPC data currently available and present the light
curve of SN1978K based upon these observations. We also present the
ROSAT PSPC spectrum. Comparison will be made to the outgoing shock
and reverse shock models which predict X-ray emission.